System Pressure Release
Show/hide table
有压力的系统: 热的冷却液能造成严重的烫伤。 为了打开盖子,要停机,等候散热器冷下来。 然后慢慢松开盖子,释放压力。 |
要释放冷却系统的压力,将发动机起动开关移到断开位置。 让冷却系统压力盖冷却下来。 盖温必须达到徒手可以触摸的温度。 慢慢取下冷却系统压力盖,以便释放压力。
要释放燃油系统的压力,将发动机起动开关移到断开位置。
Show/hide table
接触高压燃油可能导致液体渗透和烧伤危险。 高压燃油溢出可能会产生火灾。 如果不遵循检查、保养和维修指南,可能会造成人身伤亡。 |
高压燃油管是指高压燃油泵和高压燃油歧管之间的燃油管以及燃油歧管和缸盖之间的燃油管。 这些燃油管与其它燃油系统上的燃油管不同。
高压燃油管由于以下原因而不同于其他燃油系统上的燃油管:
- 高压燃油管始终充满高压。
- 高压燃油管的内部压力比其他类型的燃油系统要高。
在发动机燃油管上执行任何维修或修理之前,需执行以下任务:
- 把发动机的起动开关转到 OFF(断开)的位置。
- 等待 10 分钟。
注: 燃油压力可通过 Caterpillar 电子技师(ET)来监控。
不要通过松开高压燃油管来排除燃油系统中的空气。
Show/hide table
增压系统! 液压蓄能器含有高压气体和机油。 请勿断开管路或拆解加压蓄能器的任何部件。 维修蓄能器或任何蓄能器部件前,应按照维修手册的说明从蓄能器中清除预充气体。 不遵循这些说明和警告会造成人身伤亡。 只能使用干燥的氮气加注蓄能器。 有关特殊设备和蓄能器维修和充注的详细信息,请咨询您的 Cat 代理商。 |
执行下述步骤以释放系统的全部压力:
- 起动发动机并完全缩回推料器铲刀。 将推料器控制装置移到浮动位置。
- 关闭发动机,然后将发动机起动开关转至接通位置。
- 按下行车制动器数次,直到释放行车制动器系统油中的全部压力。
- 将停车制动器控制器在接合位置和脱开位置之间移动。
- 重复步骤 3 至步骤 4。 重复该步骤数次,直到释放停车制动器系统油中的全部压力。
- 将发动机起动开关转到断开位置。
- 顺时针旋转方向盘,然后逆时针旋转方向盘。
- 小心地拆卸推料器和制动系统液压油箱的加注口盖。 拆下加注口盖将释放液压油箱中的全部压力。
- 小心地拆卸转向和风扇驱动系统液压油箱的加注口盖。 拆下加注口盖将释放液压油箱中的全部压力。
要释放机油系统的压力,将发动机起动开关移到断开位置。
Caterpillar Information System:
740B EJECTOR Articulated Truck Sampling Interval and Location of Sampling Valve
740B EJECTOR Articulated Truck Capacities (Refill)
740C EJECTOR Articulated Truck Tire Shipping Pressure
2011/05/09 An Improved V-Belt for the Alternator is Now Used on Certain Cold Planers {1405}
740B EJECTOR Articulated Truck Parking Brake Manual Release
Instructions to Obtain and Upload a Warranty Report File for C4.4 through C32 Tier 4 Interim Engines {0336, 7772} Instructions to Obtain and Upload a Warranty Report File for C4.4 through C32 Tier 4 Interim Engines {0336, 7772}
740B EJECTOR Articulated Truck Towing the Machine
740B EJECTOR Articulated Truck Jacking/Blocking Locations
2011/03/11 Use the Latest Available Production Version of Cat ET for Tier 4 Interim C4.4 though C32 Engines {0785, 1900, 7610}
2013/06/11 Use the Latest Available Production Version of Cat ET on All Machines with Tier 4 Interim C4.4 through C32 Engines {0785, 7600, 7610}
2011/03/11 Instructions to Obtain and Upload a Warranty Report File Are Now Available for C4.4 through C32 Tier 4 Interim Engines {0336, 7772}
2011/03/11 Instructions to Obtain and Upload a Warranty Report File Are Now Available for All Machines Equipped with C4.4 through C32 Tier 4 Interim Engines {0336, 7772}
740B EJECTOR Articulated Truck Body Mounting - Lubricate
Field Procedure to Install new Platform Assemblies on the 770 and 772 Off-Highway Trucks{1408, 1417, 1429, 7051, 7155, 7156, 7251, 7253, 7254, 7256, 7267, 7405, 7557} Field Procedure to Install new Platform Assemblies on the 770 and 772 Off-Highway Trucks{1408, 1417, 1429, 7051, 7155, 7156, 7251, 7253, 7254, 7256, 7267, 7405, 7557}
2011/04/22 A new Special Instruction is Available for Replacing the Platform Assemblies on the 770 and 772 Off-Highway Trucks {1408, 1417, 1429, 7051, 7155, 7156, 7251, 7254, 7256, 7263, 7267, 7405, 7557}
2011/04/22 Improved Fender Groups are now Used on 770, and 772 Off-Highway Trucks {7252}
735B and 740B Articulated Trucks Cooling System Pressure Cap - Clean/Replace
C7.1 Engines For Caterpillar Built Machines Glow Plug Starting Aid - Test
C7.1 Engines For Caterpillar Built Machines Ignition Keyswitch Circuit and Battery Supply Circuit - Test
C7.1 Engines For Caterpillar Built Machines Indicator Lamp Circuit - Test
422F, 428F, 432F, 434F and 444F Backhoe Loaders Battery Disconnect
2011/08/29 The Toggle Switch Has Been Relocated to the Frame Assembly of the 770 and 772 Off-Highway Trucks {1258, 1260, 1261, 7332}
450F Backhoe Loader Lubricant Viscosities - Fluids Recommendations
2011/07/07 A New Serpentine Belt and Belt Tensioner Are Now Used on 777F Off-Highway Trucks {1357, 1358, 1397}